71256663263 has 4 divisors (see below), whose sum is σ = 71277692520. Its totient is φ = 71235634008.

The previous prime is 71256663227. The next prime is 71256663301. The reversal of 71256663263 is 36236665217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36236665217 = 1579 ⋅22949123.

It is a cyclic number.

It is not a de Polignac number, because 71256663263 - 2¹² = 71256659167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71256666263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10509545 + ... + 10516322.

It is an arithmetic number, because the mean of its divisors is an integer number (17819423130).

Almost surely, 2^71256663263 is an apocalyptic number.

71256663263 is a deficient number, since it is larger than the sum of its proper divisors (21029257).

71256663263 is a wasteful number, since it uses less digits than its factorization.

71256663263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21029256.

The product of its digits is 1632960, while the sum is 47.

The spelling of 71256663263 in words is "seventy-one billion, two hundred fifty-six million, six hundred sixty-three thousand, two hundred sixty-three".